/// <summary>
/// Checks if a given <paramref name="fileUri" /> can be interpreted as CSV without any errors.
/// </summary>
/// <param name="fileUri">The location of the CSV file.</param>
/// <param name="encoding">The encoding to use.</param>
/// <param name="containsHeaders"><c>true</c> if headers are present in the topmose line.</param>
/// <param name="separator">The char which seperates columns.</param>
/// <returns><c>true</c> if the file is valid otherwise <c>false</c>.</returns>
public static bool IsValidCsvFile(string fileUri, Encoding encoding, bool containsHeaders = false, char separator = ',')
{
if (!File.Exists(fileUri))
{
throw new FileNotFoundException("Provided file not found.", fileUri);
}
string[] lines = null;
try
{
lines = File.ReadAllLines(fileUri, encoding);
}
catch
{
}
if (lines == null || !lines.Any())
{
return(false);
}
var firstLine = lines[0].Split(separator);
if (!firstLine.Any())
{
return(false);
}
var result = true;
var lineNo = 1;
foreach (var line in lines)
{
result &= line.Split(separator).Count() == firstLine.Count();
lineNo++;
if (!result)
{
TraceUtil.WriteTraceError("Line #{0}", lineNo);
break;
}
}
return(result);
}
/// <summary>
/// Has to be called before any other operation in this type.
/// </summary>
/// <param name="server">The server dns name without any prefix and port.</param>
/// <param name="user">The user name.</param>
/// <param name="pass">The password of the <paramref name="user"/>.</param>
/// <param name="port">The port number (defaults to 21).</param>
/// <returns></returns>
public Task <bool> InitializeAsync(string server, string user, string pass, int port = 21)
{
return(Task.Run(
() =>
{
_initialized = false;
_server = server;
_user = user.ToSecureString();
_pass = pass.ToSecureString();
_port = port;
try
{
var request = GetRequest();
_initialized = request != null;
}
catch (Exception ex)
{
TraceUtil.WriteTraceError(ex.Message);
}
return _initialized;
}));
}